* alpha-tdep.c (alpha_sigcontext_addr): New function.
(alpha_find_saved_regs): Use alpha_sigcontext_addr.
(alpha_gdbarch_init): Initialize tdep->sigcontext_addr.
* alpha-linux-tdep.c: Include frame.h.
(alpha_linux_sigcontext_addr): New function.
(alpha_linux_init_abi): Set tdep->sigcontext_addr to
alpha_linux_sigcontext_addr.
* alpha-osf1-tdep.c: Include gdbcore.h.
(alpha_osf1_sigcontext_addr): New function.
(alpha_osf1_init_abi): Set tdep->sigcontext_addr to
alpha_osf1_sigcontext_addr.
* config/alpha/tm-alpha.h (SIGCONTEXT_ADDR): Remove.
* config/alpha/tm-alphalinux.h (SIGCONTEXT_ADDR): Remove.
an Alpha ABI variant.
(alpha_abi_handler_list): Declare.
(alpha_gdbarch_register_os_abi): New function.
(alpha_gdbarch_init): Give registered ABI variant handlers a
chance to tweak the gdbarch once we have set up defaults.
* alpha-tdep.h: Prototype alpha_gdbarch_register_os_abi.
* alpha-tdep.c (heuristic_proc_start): Use vm_min_address
from gdbarch_tdep rather than a constant.
(alpha_gdbarch_init): Initialize tdep->vm_min_address to
the default text address for all Alpha Unix ABIs.
(alpha_dump_tdep): Report the value of tdep->vm_min_address.
* config/alpha/tm-alpha.h (VM_MIN_ADDRESS): Delete.
taken from...
* config/alpha/tm-alpha.h: ...here. Remove macros that we now
let gdbarch deal with.
(GDB_MULTI_ARCH): Define as GDB_MULTI_ARCH_PARTIAL.
* Makefile.in (alpha-nat.o): Add alpha-tdep.h and $(BFD_SRC)/elf-bfd
to dependency list.
* alpha-nat.c: Include alpha-tdep.h. Update for adjusted
Alpha target register names.
* alphabsd-nat.c: Likewise.
* alpha-tdep.c: Include alpha-tdep.h. Update for adjusted
Alpha target register names. Make serveral routines static.
(alpha_get_saved_register): New function.
(alpha_abi_names): New.
(process_note_abi_tag_sections): New function.
(get_elfosabi): New function.
(alpha_gdbarch_init): New function.
(alpha_dump_tdep): New function.
(_initialize_alpha_tdep): Register alpha_gdbarch_init.
